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Cheap flights from Idaho Falls to Illinois from $118

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Idaho Falls to Illinois departing on 10/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Idaho Falls to Illinois

Cheap round-trip flights

Logo
7:40 pm - 8:48 pmIDA-ORD
24h 08m1 stop
Logo
9:54 pm - 12:49 pmORD-IDA
15h 55m1 stop
$290
Find Deal
Mon, Oct 6 - Sun, Oct 12
Logo
7:40 pm - 8:48 pmIDA-ORD
24h 08m1 stop
Logo
6:35 am - 12:49 pmORD-IDA
7h 14m1 stop
$295
Find Deal
Mon, Oct 13 - Mon, Oct 20
Logo
7:40 pm - 8:48 pmIDA-ORD
24h 08m1 stop
Logo
6:35 am - 12:49 pmORD-IDA
7h 14m1 stop
$296
Find Deal
Mon, Oct 6 - Mon, Oct 13
American Airlines Logo
1:11 pm - 5:28 pmIDA-ORD
3h 17mnonstop
American Airlines Logo
9:45 am - 12:25 pmORD-IDA
3h 40mnonstop
$331American Airlines
Find Deal
Fri, Oct 24 - Mon, Oct 27
United Airlines Logo
2:35 pm - 10:39 pmIDA-ORD
7h 04m1 stop
United Airlines Logo
5:01 am - 9:48 amORD-IDA
5h 47m1 stop
$350United Airlines
Find Deal
Tue, Oct 7 - Tue, Oct 14
United Airlines Logo
5:56 pm - 11:59 pmIDA-ORD
5h 03m1 stop
United Airlines Logo
7:10 am - 1:33 pmORD-IDA
7h 23m1 stop
$356United Airlines
Find Deal
Thu, Oct 2 - Sat, Oct 11
American Airlines Logo
1:11 pm - 5:28 pmIDA-ORD
3h 17mnonstop
American Airlines Logo
9:44 am - 12:24 pmORD-IDA
3h 40mnonstop
$359American Airlines
Find Deal
Fri, Oct 24 - Sat, Nov 1
Delta Logo
6:53 pm - 12:24 amIDA-STL
4h 31m1 stop
Delta Logo
6:50 am - 12:33 pmSTL-IDA
6h 43m1 stop
$388Delta
Find Deal
Wed, Oct 15 - Sat, Oct 18
Hawaiian Airlines Logo
3:50 pm - 12:24 amIDA-ORD
7h 34m1 stop
Hawaiian Airlines Logo
8:00 am - 3:13 pmORD-IDA
8h 13m1 stop
$394Hawaiian Airlines
Find Deal
Thu, Oct 30 - Sat, Nov 8
Delta Logo
6:57 pm - 9:38 amIDA-ORD
13h 41m2 stops
Delta Logo
7:24 am - 12:27 pmORD-IDA
6h 03m1 stop
$430Delta
Find Deal
Tue, Dec 30 - Sat, Jan 3

United Airlines flights from Idaho Falls to Illinois

Our best United Airlines deals on Idaho Falls to Illinois flight tickets
United Airlines
Oct 7
IDA2:35 pmIdaho Falls Fanning Field
7h 04m
1 stop
ORD10:39 pmChicago O'Hare Intl
Oct 14
ORD5:01 amChicago O'Hare Intl
5h 47m
1 stop
IDA9:48 amIdaho Falls Fanning Field
$350
Find similar
United Airlines
Oct 2
IDA5:56 pmIdaho Falls Fanning Field
5h 03m
1 stop
ORD11:59 pmChicago O'Hare Intl
Oct 11
ORD7:10 amChicago O'Hare Intl
7h 23m
1 stop
IDA1:33 pmIdaho Falls Fanning Field
$356
Find similar
United Airlines
Oct 23
IDA5:00 amIdaho Falls Fanning Field
5h 28m
1 stop
ORD11:28 amChicago O'Hare Intl
Oct 28
ORD7:10 amChicago O'Hare Intl
7h 25m
1 stop
IDA1:35 pmIdaho Falls Fanning Field
$390
Find similar

American Airlines flights from Idaho Falls to Illinois

Our best American Airlines deals on Idaho Falls to Illinois flight tickets
American Airlines
Oct 24
IDA1:11 pmIdaho Falls Fanning Field
3h 17m
ORD5:28 pmChicago O'Hare Intl
Oct 27
ORD9:45 amChicago O'Hare Intl
3h 40m
IDA12:25 pmIdaho Falls Fanning Field
$331
Find similar
American Airlines
Oct 24
IDA1:11 pmIdaho Falls Fanning Field
3h 17m
ORD5:28 pmChicago O'Hare Intl
Nov 1
ORD9:44 amChicago O'Hare Intl
3h 40m
IDA12:24 pmIdaho Falls Fanning Field
$359
Find similar
American Airlines
Oct 30
IDA1:11 pmIdaho Falls Fanning Field
3h 17m
ORD5:28 pmChicago O'Hare Intl
Nov 8
ORD5:18 amChicago O'Hare Intl
9h 10m
1 stop
IDA1:28 pmIdaho Falls Fanning Field
$366
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Idaho Falls to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated September 9, 2025.
Use the filters below to find and compare flights from Idaho Falls to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Mon 10/6

7:40 pm-8:48 pm

1 stop24h 08m

Chicago O'Hare Intl

Sun 10/12

9:54 pm-12:49 pm

1 stop15h 55m

$290

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Mon 10/13

7:40 pm-8:48 pm

1 stop24h 08m

Chicago O'Hare Intl

Mon 10/20

6:35 am-12:49 pm

1 stop7h 14m

$295

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Mon 10/6

7:40 pm-8:48 pm

1 stop24h 08m

Chicago O'Hare Intl

Mon 10/13

6:35 am-12:49 pm

1 stop7h 14m

$296

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Fri 10/24

1:11 pm-5:28 pm

Nonstop3h 17m

Chicago O'Hare Intl

Mon 10/27

9:45 am-12:25 pm

Nonstop3h 40m

$331

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Tue 10/7

2:35 pm-10:39 pm

1 stop7h 04m

Chicago O'Hare Intl

Tue 10/14

5:01 am-9:48 am

1 stop5h 47m

$350

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Thu 10/2

5:56 pm-11:59 pm

1 stop5h 03m

Chicago O'Hare Intl

Sat 10/11

7:10 am-1:33 pm

1 stop7h 23m

$356

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Fri 10/24

1:11 pm-5:28 pm

Nonstop3h 17m

Chicago O'Hare Intl

Sat 11/1

9:44 am-12:24 pm

Nonstop3h 40m

$359

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Wed 10/15

6:53 pm-12:24 am

1 stop4h 31m

Lambert-St Louis

Sat 10/18

6:50 am-12:33 pm

1 stop6h 43m

$388

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Thu 10/30

3:50 pm-12:24 am

1 stop7h 34m

Chicago O'Hare Intl

Sat 11/8

8:00 am-3:13 pm

1 stop8h 13m

$394

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Tue 12/30

6:57 pm-9:38 am

2 stops13h 41m

Chicago O'Hare Intl

Sat 1/3

7:24 am-12:27 pm

1 stop6h 03m

$430

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

How to get the cheapest flight ticket from Idaho Falls to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Idaho Falls to Illinois is on a Tuesday when prices can be found for as low as $331. Flights from Idaho Falls to Illinois on a Sunday will generally be more expensive and average around $544. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is at noon. Flights from Idaho Falls to Illinois during this time can be as low as $378. Flights in the afternoon are often more expensive with an average ticket price of $616.

What is the cheapest Idaho Falls Fanning Field to Illinois flight route?

Fly from Idaho Falls Fanning Field to Chicago O'Hare Intl for the best Idaho Falls Fanning Field - Illinois flight prices

What cabin class options are available on Idaho Falls Fanning Field to Illinois flights?

There are 2 cabin classes available to choose from on Idaho Falls Fanning Field to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cheap Idaho Falls to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Idaho Falls to Illinois

Best Price Found

$297

Fastest flight time

3h 14m

Direct flights

Every day

Airports in Illinois

1 airport
The best one-way flight to Illinois from Idaho Falls in the past 72 hours is $297. The best round-trip flight deal from Idaho Falls to Illinois found on momondo in the last 72 hours is $387.
The fastest flight from Idaho Falls to Illinois takes 3h 14m
Direct flights go from Idaho Falls to Illinois every day.
There is 1 airport near Illinois: Chicago O'Hare Intl (ORD)
Search flight deals

  • When did momondo last update prices for flights from Idaho Falls Fanning Field Airport to Illinois?

    Prices for flights from Idaho Falls Fanning Field Airport to Illinois are refreshed on a daily basis.

  • How many operators does momondo search for flights from Idaho Falls Fanning Field Airport to Illinois?

  • How old do you have to be to fly from Idaho Falls Fanning Field Airport to Illinois?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho Falls Fanning Field Airport to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Idaho Falls to Illinois?

Best airlines flying from Idaho Falls to Illinois

Compare and see reviews for airlines that fly from Idaho Falls to Illinois with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $323Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $361Free CancellationRating
7.4
8,943 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Idaho Falls to Illinois?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Idaho Falls to Illinois for you.

Can I find flights from Idaho Falls to Illinois with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Idaho Falls to Illinois flights to just show those with flexible booking policies.

How can momondo help me find flights from Idaho Falls to Illinois?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Idaho Falls.

I’m not ready to book a flight from Idaho Falls to Illinois right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Idaho Falls to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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